CN103603344A - Rotary drilling and pile filling construction method capable of preventing hole collapse - Google Patents

Rotary drilling and pile filling construction method capable of preventing hole collapse Download PDF

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Publication number
CN103603344A
CN103603344A CN201310650133.9A CN201310650133A CN103603344A CN 103603344 A CN103603344 A CN 103603344A CN 201310650133 A CN201310650133 A CN 201310650133A CN 103603344 A CN103603344 A CN 103603344A
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hole
pile
reinforcing cage
outside
protective pipe
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CN201310650133.9A
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CN103603344B (en
Inventor
李智能
魏奇科
李青枫
汪建
宋春芳
狄佳
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China Metallurgical Construction Engineering Group Co Ltd
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China Metallurgical Construction Engineering Group Co Ltd
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Abstract

The invention discloses a rotary drilling and pile filling construction method capable of preventing hole collapse. The method comprises the following steps: drilling a pile hole; placing a reinforcement cage smaller than the pile hole into the pile hole; turning on accumulated soil falling prevention devices on the outer side faces of the lower end of the reinforcement cage; arranging an outer protection tube on the outer side of the reinforcement cage, and placing the lower end of the outer protection tube on the accumulated soil falling prevention devices; cleaning sediments on the hole bottom and hole walls; casting concrete into the bottom end of the pile hole through the inner cavity of the reinforcement cage, wherein the concrete and steel bars in the reinforcement cage form a reinforced concrete structure of which the strength is consistent with requirements, so that a building filling foundation pile is obtained. According to the construction method disclosed by the invention, the accumulated soil falling prevention devices and the outer protection tube are adopted, so that falling soil in a loose soil layer can be effectively prevented from falling into the bottom of the pile hole and a formed pile, and the piling quality is improved; during concrete casing, loosened soil generated by vibrating the inner walls of the pile hole is isolated on the outer sides and prevented from entering the concrete by the outer protection tube, so that the quality of a molded pile foundation is ensured; a pile is cast in situ, so that the method can be suitable for a plurality of geological conditions, and the construction cost can be reduced.

Description

A kind ofly prevent that revolving of collapse hole from scraping out hole pouring pile construction method
Technical field
The present invention relates to a kind of construction method of buildings pile, especially a kind ofly prevent that revolving of collapse hole from scraping out hole pouring pile construction method.
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Background technology
The stake hole of buildings pile, conventional method is to adopt hand digging, exist following not enough: in borehole, labour intensity is larger, single pile speed of application is slower, especially safety is poor, easily occurs the dangerous situations such as landslide, in the time of may having the gas of humus deposits yields to spill in hole in soil layer, bottom, stake hole also can deposit a large amount of toxic gases, to construction safety, brings potential safety hazard.
In order to overcome the deficiencies such as long construction period, the quick rise of human cost, unit in charge of construction generally adopts the technology of digging of revolving, to adopt the plant equipment such as rotary drilling rig to carry out accelerating construction progress; What is called is revolved and is dug stake, the stake type of being constructed by rotary drilling rig, full name rotary digging drilling hole bored concrete pile, in engineering, be called for short to revolve and dig stake, owing to using mechanical work, less demanding to workman's number, can save very large labour cost, therefore be widely used in the foundation pile construction of highway, railway, bridge and the heavy construction of China.But, the existing technology of digging of revolving, can not adapt to as hills such as Chongqing, there is the construction on a large amount of back fill courses ground in mountain regions etc., the top on the ground layer (back fill course) that is to loosen the soil of constructing, bottom is lithosphere: its reason is mainly following 2 points: 1, when upper strata, stake hole has backfill etc. and loosens the soil layer, transfer in reinforcing cage and concreting process revolving in digging a hole, along with transferring reinforcing cage, constantly scratch the vibrations of loosening the soil in layer or concreting process, the part earth loosening the soil in layer can be fallen in a bottom, hole or concrete and the concrete pile body after solidifying exists, reduce the quality of concrete pile body, the supporting capacity of pile foundation is reduced, even significantly reduce, bring larger or serious potential safety hazard, its two, cannot remove and revolve a sediment (layer or revolve of loosening the soil digs the stone flour that pile crown and rock frictional test form) that digs stake bottom, make it to meet engineering specification (bottom stake hole, soft formation thickness is less than 5cm).The 3rd, when borehole, if revolved, dig a hole and occur deviation, also there is deviation in the concrete pile of building, cannot correct thereupon, causes the position of concrete pile not meet designing requirement, also has larger potential safety hazard.
For rotary drilling rig in prior art, revolve and dig pile driving construction above shortcomings, applicant, has applied for that in 2013-03-13 name is called the patent of invention of " revolving of buildings pile scrapes out hole construction method ", and its application number is 201310079641.6; But through trying out of a period of time, the applicant has proposed the construction method of cast in situs pile, is more suitable for multiple geological conditions, and can reduce difficulty of construction and reduce costs.
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Summary of the invention
The problems referred to above that exist for prior art, the problems referred to above that exist for prior art, the invention provides a kind of layer that can effectively prevent from loosening the soil fall into revolve dig a hole, easy cleaning bottom sediment, reduce labor strength, a kind of of cast in situs prevents that revolving of collapse hole from scraping out hole pouring pile construction method.
To achieve these goals, the present invention adopts following technical scheme: a kind ofly prevent that revolving of collapse hole from scraping out hole pouring pile construction method, is characterized in that comprising the steps:
(1) adopt rotary drilling machinery equipment, according to production engineering specifications, carry out the excavation in a hole;
(2), according to production engineering specifications, make reinforcing cage; The size of reinforcing cage is less than a hole, can be placed in a hole;
(3) at the lateral surface of reinforcing cage lower end, a long-pending native falling stop device is set, after this device enters a hole in company with reinforcing cage and opens, can shutoff reinforcing cage lateral wall with stake hole inwall between space, accept from outside reinforcing cage toward the loose earth and the impurity that fall in a hole;
(4) reinforcing cage with long-pending native falling stop device is placed in a hole, and opens long-pending native falling stop device;
(5) in the outside of reinforcing cage, an outside protective pipe is set, the lower end of outside protective pipe is placed on long-pending native falling stop device; The internal diameter of outside protective pipe is greater than the external diameter of reinforcing cage, and reinforcing cage is positioned at the inner side of outside protective pipe;
(6) at the bottom of cleaning hole and the hole wall sediment of certain altitude scope, to reach technological requirement;
(7) according to production engineering specifications, by reinforcing cage inner chamber to bottom, stake hole concreting; After drying, maintenance, reinforcing bar in concrete and rebar cage forms a satisfactory reinforced concrete structure of intensity, obtains meeting the castinplace pile of the buildings pile of production engineering specifications; By the space backfill between outside protective pipe outside and stake hole wall;
Or, first by the space backfill between outside protective pipe outside and a hole wall, then to concreting in reinforcing cage, obtain meeting the castinplace pile of the buildings pile of production engineering specifications;
Or, in reinforcing cage when fluid concrete, by the space backfill between the stake shell outside with reinforcing bar and a hole wall, obtain meeting the castinplace pile of the buildings pile of production engineering specifications.
Further feature is, in the outside of reinforcing cage along circumferentially several anti-bias blocks being set, the external diameter of anti-bias block, the setting that matches with the internal diameter of outside protective pipe, is less than setting value of internal diameter of outside protective pipe.
Compared to existing technology, beneficial effect of the present invention is as follows:
(1) adopt long-pending native falling stop device and outside protective pipe, the layer that can effectively prevent from the loosening the soil soil that falls is fallen in a bottom, hole and moulding stake, has improved pile quality.
(2) there is outside protective pipe protection, manually go to the bottom and carry out sediment and have clearly higher safety guarantee.Or, adopt irrigation device to remove the sediment of bottom, stake hole and sidewall, easy to operate, and almost whole sediments can be cleaned out to far super engineering specification requirement.
(3) when concreting, must adapted tamping equipment, outside protective pipe in outside, does not enter in concrete it stake hole inwall issuable impurities such as loosen the soil when vibrating, and guarantees the quality after pile foundation moulding.
(4) build at the construction field (site), concrete is injected in stake hole, concrete and rebar cage is solidified into one and forms the stressed pile foundation of building, and does not need prefabricated reinforced concrete cage in advance, has reduced difficulty of construction, has reduced the freight volume of material.
(5) at pile foundation hole cast in situs pile, more multiple geological conditions can be adapted to, construction cost can be reduced.
(6) adopt rotary drilling machinery equipment to dig a hole, efficiency of construction is very high, has saved a large amount of manpowers, and construction safety.
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Accompanying drawing explanation
Fig. 1 revolves the structural representation that digs building pile datum hole cast in situs pile.
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The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Shown in Fig. 1, a kind ofly prevent that revolving of collapse hole from scraping out hole pouring pile construction method, adapt to as the hills such as Chongqing, mountain region exist the construction on a large amount of back fill courses ground, the top on the ground of constructing is loosen the soil layer (back fill course), and bottom is lithosphere; Certainly be also applicable to the construction under other geological conditionss; It comprises the steps:
1, adopt rotary drilling machinery equipment, as Spiral digging machine of the prior art, rotary drilling rig etc., according to production engineering specifications, carry out the excavation in a hole; The parameters such as distance between the degree of depth in each hole, width (diameter), adjacent studs hole, determine according to designing requirement, meet production engineering specifications;
2,, according to production engineering specifications, make reinforcing cage; The size of reinforcing cage is less than a hole, can be placed in a hole; For the reinforcing cage of common circle, just refer to that the diameter of reinforcing cage is less than the diameter in a hole; Reinforcing cage conventionally adopt reinforcing bar make one cylindric, form the reinforcing cage of tubular, horizontal, vertical stirrup is set if desired;
3, at the lateral surface of the lower end of reinforcing cage, arrange one and can accept the long-pending native falling stop device that falls into the earth in a hole from reinforcing cage outside, after this device enters a hole in company with reinforcing cage and opens, space between energy shutoff reinforcing cage lateral wall and stake hole inwall, accepts reinforcing cage outside toward the loose earth and the impurity that fall in a hole; This device automatically (spring action) or artificial (manual or external force triggers) opens, and opens the space between rear shutoff reinforcing cage outside and stake hole inwall, accepts from reinforcing cage outside toward the loose earth and the impurity that fall in a hole, and keeps reinforcing cage to stablize; A kind of concrete structure of this long-pending native falling stop device, structure in the form of a ring, its lower end is arranged on reinforcing cage and (is firmly connected with the reinforcing bar of reinforcing cage), upper end is folding within the specific limits, after opening, forms a up big and down small taper platform structure (frustum structure) under spring action or artificial effect; This long-pending native falling stop device can be accepted the outside loose earth that down drop (toward bottom, stake hole) from reinforcing cage, dregs etc., and it is deposited on long-pending native falling stop device, prevents that earth, dregs etc. from falling into a bottom, hole;
Concrete long-pending native falling stop device, referring to the aforesaid patent of the applicant, and the applicant has applied for and the concrete structure of disclosed long-pending native falling stop device, at this, is not described further.
4, the reinforcing cage with long-pending native falling stop device is placed in a hole, and opens long-pending native falling stop device; Accurately place in strict accordance with production engineering specifications the position of reinforcing cage, and the position deviation (as the deviation of stake axially bored line) that particular location that can be by adjusting reinforcing cage produces when excavating stake hole is carried out the fine setting of certain limit.
5, in the outside of reinforcing cage, an outside protective pipe is set, the lower end of outside protective pipe is placed on long-pending native falling stop device; Be the external diameter that the internal diameter of outside protective pipe is greater than reinforcing cage, reinforcing cage is positioned at the inner side of outside protective pipe;
In order further to make outside protective pipe and reinforcing cage arranged concentric; edge, outside at reinforcing cage circumferentially arranges several anti-bias blocks; the external diameter of anti-bias block; setting matches with the internal diameter of outside protective pipe; conventionally be less than setting value of internal diameter of outside protective pipe; as 0.5-10 centimetre, like this outside protective pipe can be conveniently set, also can automatically prevent the bias of outside protective pipe simultaneously.
Outside protective pipe of the present invention, can adopt existing bellows, plastic pipe, sewer pipe etc.
6, at the bottom of cleaning hole and the hole wall sediment of certain altitude scope (apart from the hole wall of certain altitude scope at the bottom of hole), to reach technological requirement;
At the bottom of cleaning hole and the method for hole wall sediment a lot, can adopt at the bottom of manually entering hole and remove, or adopt plant equipment to remove, or employing adds clear water to bottom, stake hole, artificial stirring or Aerated stirring are discharged mud to form mud again, or in the situation that stake hole bottom itself has certain water outlet, artificial stirring or Aerated stirring are discharged mud to form mud again, or manually stirring or Aerated stirring form after mud, need not directly mud be discharged, but by concrete, density is squeezed to rising lower than concrete mud when concreting, finally discharge stake hole, or add the chemical substance that prevents mud sediment in the mud of bottom, stake hole, finally when concreting, by concrete, density is squeezed to rising lower than concrete mud, finally discharge stake hole, aforementioned method for cleaning, at the bottom of can cleaning out hole and hole wall sediment, reaches even far super technological requirement.
As, adopt at the bottom of manually entering hole and remove, can directly sediment be cleared up away, or the fine dusts in water and sediment is mixed to form mud, then mud is cleared up away, meet the requirements of cleannes.
7, according to production engineering specifications, by reinforcing cage inner chamber to bottom, stake hole concreting; The measure such as need to be equipped with necessary stirring when building, vibrate; After drying, maintenance, reinforcing bar in concrete and rebar cage forms a satisfactory reinforced concrete structure of intensity, obtains meeting the castinplace pile of the buildings pile of production engineering specifications.By the space backfill between outside protective pipe outside and stake hole wall (soil layer), and fill up, available sandstone, fine sand or concrete etc. tamp;
Or, first by the space backfill between outside protective pipe outside and a hole wall, then to concreting in reinforcing cage, obtain meeting the castinplace pile of the buildings pile of production engineering specifications;
Or, in reinforcing cage when fluid concrete, by the space backfill between the stake shell outside with reinforcing bar and a hole wall.
In Fig. 1, in stake hole 1, be provided with reinforcing cage 2, reinforcing cage 2 is from the bottom in stake hole 1 to top,, its length matches with the degree of depth in stake hole 1; Long-pending native falling stop device 3 is arranged on the lateral surface of the Huo Zhong lower end, lower end of reinforcing cage, it launches to form a up big and down small taper platform structure after (opening), space between shutoff reinforcing cage outside and stake hole inwall, accept from reinforcing cage outside toward the loose earth and the impurity that fall in a hole, and keep reinforcing cage stable; Outside protective pipe 4 is enclosed within reinforcing cage 2 outsides, on the long-pending native falling stop device 3 after its lower end is placed on and opens; At the anti-bias block 21 of reinforcing cage 2 external circumferential settings, be less than the internal diameter 1-5 centimetre of outside protective pipe 4, like this outside protective pipe 4 can be conveniently set, also can automatically prevent that outside protective pipe 4 is in the bias in reinforcing cage 2 outsides simultaneously.Outside protective pipe 4 adopts existing suitable pipeline, as bellows, plastic pipe, rubber tube etc.; While being drilled with hole 1, stake hole 1 is uppermost is back fill course 13, is then severely-weathered horizon d 14, is middle weathering horizon d 15 bottom, and a general stake hole drill is set to middle weathering horizon d and substantially just can have met related request.Finally, after the interior concreting of reinforcing cage 2, form layer of concrete 11, layer of concrete 11 is larger at the diameter of the bottom in stake hole 1, forms an enlargement layer, is conducive to the stressed of pile foundation; The reinforcing bar strong bonded of concrete and rebar cage 2, be frozen into an integral body, form the stressed pile foundation of building.Between outside protective pipe 4 and stake hole wall, Venus backfill is returned or is built, and forms backfill layer 12.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (2)

1. prevent that revolving of collapse hole from scraping out a hole pouring pile construction method, is characterized in that comprising the steps:
(1) adopt rotary drilling machinery equipment, according to production engineering specifications, carry out the excavation in a hole;
(2), according to production engineering specifications, make reinforcing cage; The size of reinforcing cage is less than a hole, can be placed in a hole;
(3) at the lateral surface of reinforcing cage lower end, a long-pending native falling stop device is set, after this device enters a hole in company with reinforcing cage and opens, can shutoff reinforcing cage lateral wall with stake hole inwall between space, accept from outside reinforcing cage toward the loose earth and the impurity that fall in a hole;
(4) reinforcing cage with long-pending native falling stop device is placed in a hole, and opens long-pending native falling stop device;
(5) in the outside of reinforcing cage, an outside protective pipe is set, the lower end of outside protective pipe is placed on long-pending native falling stop device; The internal diameter of outside protective pipe is greater than the external diameter of reinforcing cage, and reinforcing cage is positioned at the inner side of outside protective pipe;
(6) at the bottom of cleaning hole and the hole wall sediment of certain altitude scope, to reach technological requirement;
(7) according to production engineering specifications, by reinforcing cage inner chamber to bottom, stake hole concreting; After drying, maintenance, reinforcing bar in concrete and rebar cage forms a satisfactory reinforced concrete structure of intensity, obtains meeting the castinplace pile of the buildings pile of production engineering specifications; By the space backfill between outside protective pipe outside and stake hole wall;
Or, first by the space backfill between outside protective pipe outside and a hole wall, then to concreting in reinforcing cage, obtain meeting the castinplace pile of the buildings pile of production engineering specifications;
Or, in reinforcing cage when fluid concrete, by the space backfill between the stake shell outside with reinforcing bar and a hole wall, obtain meeting the castinplace pile of the buildings pile of production engineering specifications.
2. according to claim 1ly prevent that revolving of collapse hole from scraping out hole pouring pile construction method; it is characterized in that, on the edge, outside of reinforcing cage, several anti-bias blocks, the external diameter of anti-bias block are circumferentially set; the setting that matches with the internal diameter of outside protective pipe, is less than setting value of internal diameter of outside protective pipe.
CN201310650133.9A 2013-12-06 2013-12-06 A kind of spiral-digging pore cast-in-place pile construction method preventing collapse hole Active CN103603344B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104005416A (en) * 2014-04-29 2014-08-27 中建四局第六建筑工程有限公司 Method for processing major-diameter hole pile collapsed holes under high and steep slope plain fill back-pressing condition
CN105821835A (en) * 2016-03-28 2016-08-03 中国冶集团有限公司 Water injection type rotary drilling construction method for cast-in-situ bored pile
CN108560545A (en) * 2018-05-24 2018-09-21 中国建筑第八工程局有限公司 The construction method of the anti-collapse hole of rotary digging stake and anti-collapse aperture apparatus
CN108842758A (en) * 2018-06-20 2018-11-20 上海宝冶集团有限公司 Rotary digging drilling hole bored concrete pile construction method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970006690A (en) * 1995-07-14 1997-02-21 All floor pile method
CN101255690A (en) * 2008-01-16 2008-09-03 区国雄 Method for producing covering type driven cast-in-place pile
CN101487252A (en) * 2009-02-13 2009-07-22 中建八局第一建设有限公司 Construction process of cast-in-situ bored pile
CN102644275A (en) * 2012-05-22 2012-08-22 中国建筑第二工程局有限公司 Rotary-digging combined pile-forming construction method in complicated geological conditions
CN103114577A (en) * 2013-03-13 2013-05-22 中冶建工集团有限公司 Rotary excavating hole-forming construction method for building pile foundation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970006690A (en) * 1995-07-14 1997-02-21 All floor pile method
CN101255690A (en) * 2008-01-16 2008-09-03 区国雄 Method for producing covering type driven cast-in-place pile
CN101487252A (en) * 2009-02-13 2009-07-22 中建八局第一建设有限公司 Construction process of cast-in-situ bored pile
CN102644275A (en) * 2012-05-22 2012-08-22 中国建筑第二工程局有限公司 Rotary-digging combined pile-forming construction method in complicated geological conditions
CN103114577A (en) * 2013-03-13 2013-05-22 中冶建工集团有限公司 Rotary excavating hole-forming construction method for building pile foundation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104005416A (en) * 2014-04-29 2014-08-27 中建四局第六建筑工程有限公司 Method for processing major-diameter hole pile collapsed holes under high and steep slope plain fill back-pressing condition
CN104005416B (en) * 2014-04-29 2017-06-30 中建四局第六建筑工程有限公司 The processing method of large diameter hole stake collapse hole under the conditions of a kind of plain fill back-pressure for high gradient slope
CN105821835A (en) * 2016-03-28 2016-08-03 中国冶集团有限公司 Water injection type rotary drilling construction method for cast-in-situ bored pile
CN108560545A (en) * 2018-05-24 2018-09-21 中国建筑第八工程局有限公司 The construction method of the anti-collapse hole of rotary digging stake and anti-collapse aperture apparatus
CN108842758A (en) * 2018-06-20 2018-11-20 上海宝冶集团有限公司 Rotary digging drilling hole bored concrete pile construction method

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